Sliding rule.



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g SM1 "W f J. W. BUZZELL.

SLIDING RULE.

APPLICATION FILED OOT.23, 1912.

1,062,321 l l Patented May 2o, 1913.

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UNTTED STATES PATENT OFFICE.

SLIDIN G RULE.

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Specication of Letters Patent.

Patenten May 2o, 1 91a.

Application led October 23, 1912. Serial No.727,274.

.T 0 @ZZ whom, i may concern:

Be .it known that l, JESSE'VV. BUZZELL, a

citizen e?? the United States, residing at akland, in the county of Alameda and State of California,"have invented new and useful improvements in Sliding Rules, of which the following is a specification. A This invention relates to slide rules for computations of widely varied kinds, such addition, subtraction, multiplication and division, as well as the con'iputation of linear measure, or problems expressed in monetary terms.

ltis the primary object to provide structural means especially adaptable to the uses named, which may he operated with great rapidity and accuracy. lt is sought to ,enable the construction of such a device in an inexpensive manner, but in durable form. It is also the purpose to construct such a device in compact form adapted to be readily handled, which may be firmly supported in operative position, and which may be stored in a small space. l

Additional objects and advantages will be apparent, some being evident from the following specification and from the drawings, in which Figure l is a top plan view of the device, Fig 2 a bottom view thereof, Fig. 3 is a er section. on the line 3 3 of Fig. 2, Fig. -l-

u. detail end View, Fig. 5 is a similar .'iew of the opposite end.

There is illustrated a calculating instrunient coniprising the body traine l() having the elongated (.'hanneled partli and the enlarged end l2, .the former having the channel 13 extending throughout its length, and the latter being provided with the circular i opening le.' therein spaced from the channel yfand ra bcted on its under side to receive snugly and revolnbly against' the shoulder thus formed a disk 15. The disk h as a centrai recess itil on its under side 1n which there is -revolubly seated the end of a stub shaft 17 having its outer end threaded in a. suitable bridge piece 1S engaged across the opening and ehannei. The disk is of more thickness than the depth of the rabbeted part, and it n also he rabbeted slight-ly at its upper ge so that its face may lie i upper surface of the frame. lil' lock nut is engaged with the ed end oit the shaft to hold it as ad,- justed in the bridge. By the use of the ad; the disk may be maintained in such frictional engagement with the aperture '2l being formed inwardly thereof through which may bevobserve-d one ligure on a recording dial wheel 25 mounted revolubly on the under side of the frame and having a toothed edge so formed and disposed with relation to the disk 15 as to bc engaged by a tooth Q6 on the edge of the disk, for movement the distan'ce of one. tooth at each revolution of the disk. The channel 1.3 opens on both the upper end lower side of the frame, and the outer side thereof may be formed integral with the 'inner part, or separately, it is connected to the inner part by the bridge Apieces 27 adjacent each end, which are shown as being formed integral .with the outer side and screwed to the inner part of the frame,though this construction -may be variedv as found most desirable. The sides of the channel are grooved, and it is open on at least one end, while the other may be closed either permanently or by a movable gate piece Q8, as shown. Set in the channel snugly, flush with top and b0ttom, there is a slide 30, having suitable ribs on each side engaged in the grooves of the channel to hold the slide against disengagement. The slide isl movable by means of a knob' 29 on its upper side. A pendant lon-` gitudinal flange 3l is formed on the under side of the slide, having longitudinally spaced transverse apertures therein at suitable intervals. A clutch plate 32 is carried .ward the disk,being `normally held yieldably spaced from the disk,'against the pe,- riphery of which it is adapted to be pressed,

. material 33 is carried by the plate 32 on the side toward the disk. The plate may be stamped from sheet metal and may have integrally formedD thereon the supporting arms 34, as shown, each engaged through a respective aperture inthe flange 31, their extremities being turned to one side to hold respective springs engaged around each and seated against vthe flange 31. The arms -may. have suitable shoulders 36 on their may be extended at one side, as at 23, an

by the flange 3l and spaced ltherefrom to as will be explained. A suitable friction inner ortions ada ted to enOaOfe afrainst C D D the flange and hold the plate at one limit of A of the bridge piece 18, on the/under side of` 'transversely of the slide and channel.

its movei'uent. The inner ends of the arms are' oll'set uinvardly, so that the platemay lie close to theside of theframqand to permit ready engagement thereagainst of a roller 37 carried at the inner end of a push rod 38, mounted in one of the supports 39 the frame. the push rod projecting outwardly of the side' of the 'frame away from the disk, and having a suitable head thereon for engagement by a linger of a person. When the push rod isvpressedin, it lwill be seen that movement of the slide will result in a corresponding peripheral movement of the disk.

The outer side ofthe frame is provided with a rib 40 inwardly of which'tliere -is' engaged a suitable piece 41 carried by the arm 42 which in turn is extended from a hair-line carriage 43 slidable over the top of the portion 11 of the frame, and the slide. This carriage carries a piece of glass 44 having a suitable hairline 45 ruled thereon The slide has'an indicator arrow 46 thereon terminating at the outer side of the slide, its shaft beginning on the opposite side of the slide. This ariow is formed a sufficient distance from the knob 29 to permit alinement of the arrow and the hairline of the carriage 43 at times. A suitable scale 47 is formed on the outer side of the frame in close abutment with the slide, and beginning at a point.

-moved until the arrow registers with the number on the scale which is to form a part of the sum, the push rod\is then released, when the springs will disengage the clutch plate from the disk, and the slide is then moved to zero again. The next figure of the sum is then added as before, and the operation repeated until all have been sinnmarized, when 'the result will be indicated ontlie dial by the arrow on the disk,if less than the number of units on the dial, and if more, by the recorder wheel in conjunction with the dial. The disk and recorder wheel may be returned to zero'by hand. .For subtraction, the disk and wheel 25 are set to indicate the minuend, and the slide is then moved to the figure indicating the subtrahend, or the first of anumber of figures to be deducted, the, push rod being relieved of ressure so that the dial will not .be turned, the pushrod is thenpressed in, and the slide pulled to zero position. This ope`ration may be repeated with each of a series .ing-a body frzmefhaving'a guide channel therein,"`a disk revolubly' mounted thereon spaced from the channel, slide member in the channel, a clutch member mounted longitudinally thereof normally spaced from the disk and yieldably mounted for movement into engagement with thedisk, manually operated means on the trame to engage `the clutch member to bear it 'against t-e.disk, means for operating the slide, scales and pointers being formed on the frame, slide, and disk in form and relation for the pun. poses described.

2. A device of the class described comprising a body frame having a guide channel therein, and being enlarged laterally of the channel, a slide member mounted in the channel, means for moving the slide, a disk mounted revolubly on the enlargement with a portion of its periphery exposed, a longitudinally disposed laterally movable clutch member carried by the slide, adapted to engage the exposed peripher of the disk, resilient means .tending to holdit out of such engagement, a push rod carried by the frame adapted to bear upon the clutch member when operated, for rotation of the disk under movement of the slide, the frame disk` and slide having cordinated scales and pointers for the purpose named.

3. A devicel of the class described coin= l prising a'body frame having a guide channel therein, a slide meinben mounted in the channel, means for moving the slide, a disk revolubly mounted on the frame, having a portion of itsperiphery exposed toward the slide, a plate having a plurality of fingers slidably engaged in the slide, said plate lieing adapted to be moved into engagement with the disk, resilient elements co-engaged between the slide and fingers to yieldably hold the plate out of said engagement, a transversely disposed push rod extended from the side of the frame and -ha'ving its inner end disposed to bear on the plate, and coordinated scales and pointers on the frame slideand disk for the purposes-named.

4. A device or the class described cornprising a frame having a guide channeltherein,. and being enlarged laterally of the channel, a'circular opening being formed centrally of the enlargement spaced from the channel and rabbeted on its inner side, a

disk snugly'and revolubly engaged therein, a bridge member across the opening on1 the under side of the traine, a shaft engaged.. .therethrough to bear upon the disk at its 13a center, the shaft being threaded in the bridge, and adapted to be operated to hold the disk against the rabbet vof the opening against Casual rotation, a slide in the channel, a movable clutch member extended longitudinally thereof means to move clutch member against the disk for rotation of the disk under movement of the slide, means to hold the eluteh member yieldably out of engagement with' the disk, and scales and pointers on the frame slide and disk, for the purposes named.

5. A device of the class described comprising a body frame, having a guide channel therein, a disk revolubly mounted on the frame laterally of the channel, a' slide in the channel, means operable at Will forconverting sliding movement of the slide into the rotary movement of the disk, an open frame slida'ole'ion the frame over y,the channel and slide ahair-line element in the last named frame disposed transversely of the channel, scales adjacent the channel and disk and on the slide, and pointers on the slide and disk for the purposes named.

6. A device ofthe class described com prising a. flat frame member including an elongated portion and a lateral enlargement,

a channel 4having grooved lsides formed longitudinally of the elongated portion and open at one end, a circular opening formed in the enlargement and rabbeted on the under side, a-slide and revoluble disk tted snugly in the channel and opening respectively, the slide and disk being flush With the upper surface of the frame, eordinated scales and pointers on the frame slide and disk for the purposes named, means to operate the slide', means operable at Will for converting the movement of the slide into rotary movement ot the disk, and an open carriage member slidable longitudinally of the frame ex lJESSE W. BUZZELL.

Witnesses V: I

H.A. OHRENBERG, l WM. N. THORPE. 

